Which one please help

The following limit represents the derivative of a function, f, at some number a: -217 COS lim 2 + h) h-0 h Which one of the following possibilities could be correct for f and a ? O f(x) = cos(x + 7), a = 0 O f(ac) = sinx, a = -21T O f(x) = sin(a + 7), a = -217 O f ( ) = sin (7 + x) a = 0 h -217 O f(z) = cos(a), a = 2